SDCM present status and future. GLONASS signals development.

Transcription

1 The Eighth Meeting of the International Committee on Global Navigation Satellite Systems, November 9 14, 2013, Dubai SDCM present status and future. GLONASS signals development. Prof. Grigory Stupak, Dr. of Science Deputy Director General First Deputy Designer General JSC «Russian Space Systems»,

2 System of Differential Correction and Monitoring (SDCM) Data downlinks 3 GEO relay satellites SiSnet server Reference stations network (RS) 19 RS in Russia SDCM data processing center 4 RS abroad 2

3 SDCM reference stations network 19 reference stations in the territory of the RF: Pulkovo and Svetloe (Leningrad region), Mendeleevo, Moscow, Gelendzhik, Kislovodsk, Novosibirsk, Irkutsk, Petropavlovsk-Kamchatski, Tiksi, Vladivostok, Magadan, Yuzhno- Sakhalinsk, Lovozero (Murmansk region),yekaterinburg, Norilsk, Bilibino (Chukchi Peninsula), Noyabrsk (Tyumen region 4 reference stations abroad: «Bellingshausen» (Antarctica) «Novolazarevskaya» (Antarctica) «Progress» (Antarctica) Brazilia (Brazil) Several stations simultaneously track one satellite IP telephone 2. VPN module 3. Controller 4. Computer 5. GLONASS/GPS receiver 6. Hydrogen Mazer 7. UPS module 3

4 SDCM data dissemination system IP: port:

5 SDCM constellation expansion On the 11th of December, 2011 the «Luch-5A» satellite was successfully put into geostationary orbit On the 3 rd of November 2012, the «Luch-5Б» was successfully put into orbit «Luch-5Б» «Luch-5В» «Luch-5A» The «Luch-5В» satellite is scheduled for launch in Q1 of

6 Main objectives of SDCM development SBAS L1 seamless coverage of the Russian territory SBAS L1 dual coverage of the central part of Russia by 2018 Precise positioning services by SBAS L1/L5 and precise point positioning services by L1/L3 in the GLONASS band by 2018 SDCM certification for LPV-200 requirements Plan to use SDCM as a basis for future precise point positioning service Verification of SBAS+ technology 6

7 SDCM capabilities with employment of SBAS+ technology Civil aviation ICAO category approach Airfield flights Agriculture Controlling the vehicle s steering automatically for cultivation of small-seeded crops and field mapping Accurate and quick connection of fields and controlling the vehicle s steering automatically for cultivation of large-seeded crops ROAD BUSINESS Checking the state of a pre-lane road Accurate and quick connection of construction sites in the system of absolute coordinates RIVER TRANSPORT Navigation in coastal zone Accurate and quick location of navigation signs RAILWAY TRANSPORT SAFETY Tracking trains on adjacent railroad tracks. Optimization of the engine s steering GEODESY and MAPPING Updating mapping data databases Building maps of pipelines and cable routings Natural resources mapping Mapping real estate properties and construction sites 7

8 Development of SDCM Broadcasting satellites 3 L1 GEO 1 L1/L3/L5 GEO SiSnet server Unified reference stations network 46 are located in Russia up to 50 abroad, 8 of which are located along the Russian boarder SDCM center Master (Moscow, RSS) 2 regional 8

9 Unified reference stations (URS) network to assess ionospheric delay SBAS ionospheric model SBAS ionospheric model URS network arrangement URS network arrangement Standard ionosphere grid Standard ionosphere grid Simulation results Simulation results The network comprises: - 46 URS network in Russia; - 8 URS network abroad along the Russian boarder. 9

10 SBAS+ technology under verification SBAS Technology Satellite-Based Augmentation System Reliability (HPL SBAS, VPL SBAS ) Reliability (HPL SBAS+, VPL SBAS+ ) SBAS+ format is an expansion of SBAS standard through broadcasting refined orbits and clocks 10

11 Strategy to develop GLONASS open access navigation L1 L2 L3 L1 L2 Future «GLONASS» satellite L1OF L2OF - - «GLONASS-М» satellite L1OF L2OF L3OC - From 2014/ «GLONASS -К1» satellite L1OF L2OF L3OC test - «GLONASS-К2» satellite L1OF L2OF L3OC L3OC L1OC L1OC L2OC «GLONASS-KM» satellite L3OC L1OF L2OF L1OC L1OC, L3OC L2OC L1OC L5OC FDMA CDMA 11

12 GLONASS signals in L1 band GPS GLONASS old signals GLONASS new signals L1OCM L1OC Galileo BeiDou MHz 12

13 GLONASS signals in L2 band GPS GLONASS old signals GLONASS new signals L2OCp Galileo BeiDou MHz 13

14 GLONASS signals in L3 band 14

15 SBAS and ARAIM systems (algorithms) SBAS wide-band differential system which ensures integrity and better navigation accuracy ARAIM algorithm which ensures only integrity SBAS adjusts GNSS navigation information in case of a partial access and presence of other interferences ARAIM is capable of only identifying and eliminating information sent by unreliable satellites from navigation solution It is SBAS provider who is responsible for quality of the service In case ARAIM is used no responsibility is identified SBAS - Satellite-based augmentation system ARAIM Advanced receiver autonomous integrity monitoring 15

16 SBAS or ARAIM? Problem areas of replacing SBAS by ARAIM: Inability to improve navigation information as it could be possible if using SBAS corrections Problems with combined processing of various GNSS information using ARAIM algorithm (they differ in: systems of coordinates; time scales; accuracy of determining position and clocks corrections; accuracy of navigation solutions; mathematical models of satellites movement; ) Identifying who will be responsible for quality of the service and effects of poor solutions (developer of the algorithm -?; developer of SW -?; developer or manufacturer of equipment -?; ) WHO? SBAS and ARAIM will become interoperable systems in the near future rather than an alternative to each other. SBAS together with ARAIM! 16

17 Summary It is essential to continue dialogues and multilateral cooperation on compatibility and interoperability of GNSS 17

18 Thank you for your attention! Prof. Dr. Grigory G. Stupak tel: